Hot-blast for ranges or cooking-stoves.



No. 70|,474. Patented June's, I902. i

J. B. EHRLICH.

HOT B LAST FDR RANGE S 0R COOKING STUVES.

(Application filed Feb; 17, 1902A (No Model.) 2 Shanty-Sheep! I.

a ATTORNEY.

m: nomus PETERS cc. PNoi'o-umu. WASHINGTON, D.

No. 70!,474. Patented June 3, I902.

J. B. EHRLICH.

HOT BLAST FDR RANGES UR COOKING STOVES.

(Application filed Feb. 17, 1902-) (No Model.) 2 Sheets Sheet 2.

WITNESSES; a 14 l9 INVENTOR. ]Znfi Z 7/M"Za%,

7 ATTORNEY.

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UNITED ST TES PATENT ()FFICE.

JOHN B. EHRLICH, OF INDIANAPOLIS, INDIANA.

v HOT*BLAST FORBANGESOR COOKlNG-ST OVES.

SPECIFICATION forming part of Letters IPatent No. 701,474, dated June 3,1902.

Application filed February 17, 1902. Serial No. 94,434. (No model.)

To all wit/01m it may concern:

Beit known that I, JOHN B. EHRLIOH, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Hot-Blasts forRanges or Cooking-Stoves, of which the following is a specification.

The object of my invention is to providea hot-blast for ranges andcooking-stoves in which the air is procured at the top of the range orstove, conveying the same through a special constructed pipe whichextends longitudinally into the fire-pot and discharging the said airthrough slots in the pipe over the point of combustion, the object beingto heat the said air before discharging and which is calculated toefiect a more perfect ignition and combustion of the gases which arisefrom the fire.

The object consists, further, in providing a pipe having an enlargedingress-bowl formed pipe which is narrowest at its intersection with theingress-bowl,the said pipe being semicircular in form manner and widenstoward the front end. The discharge-pipe is closed at the'front end andis provided on the lower surfacewith a series of semicircular slots,through which the air is discharged. There are other features therein,and the construction and arrangement of the several parts will behereinafter more particularly described and then pointed out in theclaims.

Referring to the accompanying drawings, which are made a part hereof,and. on which similar numerals of reference indicate similar parts,Figure 1 is a fragmentary detail, in plan View, of a range and shows theposition occupied by my hot-blast. Fig. 2 is a vertical section of arange and shows my hotblast in side elevation therein. In this figure Ialso show the means for connecting the secondary ornamental ingress-bowl, which forms a stand for a swinging bracket. Fig. 3 is afragmentary detail, in plan view, of a cooking-stove and shows theposition occupied by my hot-blast. Fig. 4 is avertical section throughthe stove and the hot-blast. Fig.

5 is a side elevation of the hot-blast, the range or stove beingomitted. Fig. 6 is a bottom plan view of the hot-blast and shows theflaring of the discharge-pipe. Fig. 7is a rear elevation of my hot-blastand shows the manner in which the same is secured to the range or stove,and Fig. 8 is a cross-section of the discharge-pipe and shows theintegral strei'lgthening-rib in the bottom thereof.

In the drawings, 1 is the top of the range or stove, 2 the back, and 3thefire-pot. The top 1 is provided at the rear and near the side edgeswith an elongated aperture, the contour of which corresponds with theingressbowl of my hot-blast. The top 1 in range construction extendsconsiderably to the rear of the back 2, so that the apertures in the topare outside the said back.

4. is the discharge-pipe of the hot-blast, which pipe terminates in aningress-bowl 5. The pipe 4 is semicircular in form and widenshorizontally as it advances toward the front end, and which constructionprovides the desired air capacity, besides saving more space in avertical manner than could be obtained in using around pipe. The fiattop of the pipe 4 allows the same to be positioned in close proximity tothe range or stove top l,and thus overcomes the objectionable feature inhaving the pipe mounted too low within the firepot. The pipe 4 isprovided with a top plate 6, and which plate when it intersects theingress-bowl 5 cuts to the center thereof, and

thus brings the joint at that point which is desirable. The top plate 6and the pipe 4 are has an integral strengthening-rib 2l in-the bottom,which adds stability to said pipe. (See Fig. 8.) V,

The upper edge of the ingress-bowl 5 is flush with the surface of therange-top 1 when my hot-blast is in operating position. The ingress-bowl5 has a damper secured in the upper end thereof, by which the ingoingair is regulated. The damper is formed out of two slotted plates adjustably secured together and which are mounted in a horizontal manner insaid bowl. The lower plate 9 of the bowl.

secured together by the bolts 7. The pipe 4 ,1

carries a handle 20, by which the same is operated. The shifting of theplate 8 opens or closes the damper.

In the art of range construction it is customary to supplya range withbrackets,which are usually hinged to the back that extends above therange-top. To provide brackets for my range, I mount the bowl 10, whichis discharge and distribute the air.

of any suitable design, to the top 1. The bowl in this instance formsthe ingress to my hot-blast. The bowl 10 is provided with the integralears 11, (see Fig. 1,) each of which carries an aperture. The ears 11 atthe front of the bowl form a bearing for a swinging bracket 12, whichmay be changed to either of the said ears. The rear ears form a bearingfor an ornamental back 13, and which back is a mere ornamentation forthe range, the bowl 10, the bracket 12, and the back 13 being exposed toView and are highly polished. The stand 10 may be used in connectionwith a cooking-stove, if desired, but is most particularly adapted toranges, since in a cooking-stove the fire-pot runs lateral therewith,and in which case the stand 10 would be an impediment. The ingress-bowl5 is provided on each side near the top with the horizontally-extendedflanges 14, (see Fig. 7,) which flanges carry an aperture through whichthe bolts 15 pass and whereby the bowl is secured to the top 1.

"The pipe at is supplied with a flange 16, which for as the air passesthrough the choked portion of the pipe it is immediately subjected to aheat of high degree, which causes the air to expand, and thus forms asuction in said pipe. Hence I am able to procure and discharge a greatervolume of air into the firepot than would be possible were the pipe of auniform diameter throughout its entire length. The pipe 4 is closed atthe front end and is provided with a series of slots 18, which The slots18 are cut on a circle, which is less liable to weaken the pipe thanwere the slots cut in a direct transverse manner.

Having thus fully described my said invention, what I desire to secureby Letters Pat ent is 1. In a hot-blast for ranges and cookingstoves, adischarge pipe substantially as shown, the said pipe being semicircularin form and terminating at one end in an integrally-formed ingress-bowl,slots in the pipe which form an egress for the air, a plate 6 formingthe top for the discharge-pipe, bolts passing through the top plate andthe pipe by which the parts are secured together, integral flanges onthe pipe and bowl which carry apertures, bolts passing through the saidapertures in the flanges and the range top and back, whereby a means isprovided for securing the hot-blast to the range or stove, substantiallyas shown and described.

2. In a hot-blast for ranges and cookingstoves, a discharge pipesubstantially as shown, the said pipe being semicircular in form andflaring in a horizontal direction, slots in the pipe which form anegress for the air, the discharge pipe extending through and is securedto the back of the range or stove by means of the flange 16 and thebolts 17, the discharge-pipe curving upward at its rear end andterminating in an integrally formed ingressbowl, the upper edge of thebowl registering with an aperture in the range-top, flanges on the bowlwhich carry apertures for the bolts 15, annular integral flanges withinthe ingress-bowl which form a seat for the damper-plate 8, a dampercomposed of the plates 8 and 9, the plate 9 of the damper beingadjustably secured to the plate 8, the combined plates forming a meansfor regulating the inflow of air, substantially as shown and for thepurposes set forth.

3. Ina hot-blast for ranges and cookingstoves, a discharge-pipesemicircular in form, the said pipe extending into the firebox of therange or stove, the rear end of the pipe being curved upward andterminating in an ingress bowl, integral flanges on said bowl whichcarry apertures, bolts extending through the said apertures and therange-top, whereby the parts are secured together, a secondaryornamental stand secured to the upper surface of the range which formsthe ingress for the hot-blast, ears integrally formed on the said stand,the front ears of which form a bearing for the swinging bracket whilethe rear ears form a bearing for the ornamental back, substantially asshown and for the purposes set forth.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 3d day of February, A. D. 1902.

JOHN B. EHRLICH.

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